[Bug 1019347] Re: A message: "mount: / is busy" appears every time shutting down or rebooting.

[tuhu]

Hi, I was browsing on the net and found this link:
http://ubuntuforums.org/showthread.php?t=2008576 . I think my problem is
related to the "freezing plymouthd" that does not get killed on
rebooting or shutting down.

As instructed in the link, I put a bash script which content was:

 #! /bin/sh

ps -Af >> process.log

in  /etc/rc6.d before the "S60umountroot" script file. I opened the
"process.log" file in root directory and find this:

root      2842     2  0 18:27 ?        00:00:00 [kworker/0:3]
root      2854     1  1 18:27 ?        00:00:00 /sbin/plymouthd --mode=shutdown
root      2890     2  0 18:27 ?        00:00:00 [kworker/u:0]

I did the first solution on the link. What I did was:
1. I renamed the file of "S60umountroot" that is in /etc/rc6.d and /etc/rc0.d to "S61umountroot".
2. Created a file named "S60perso-script" and set it to be executable in /etc/rc6.d and /etc/rc0.d .

The content of the "S60perso-script" was as follows:

#! /bin/sh
### BEGIN INIT INFO
# Provides:          
# Required-Start:
# Required-Stop:
# Should-Stop:       
# Default-Start:
# Default-Stop:      0 6
# Short-Description: Kill freezing plymouthd
### END INIT INFO

PATH=/usr/lib/lightdm/lightdm:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games

case "$1" in
  start)
    
    killall -9 plymouthd
    
    ;;
  restart|reload|force-reload)
    
    ;;
  stop)
    
    killall -9 plymouthd
    
    ;;
  *)

    ;;
esac

:

{Source: http://ubuntuforums.org/showthread.php?t=2008576 }

That's it! And, the "mount:/ busy message" does not appear again on
shutting down or rebooting. And I think the problem was not in upstart.

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https://bugs.launchpad.net/bugs/1019347

Title:
  A message: "mount: / is busy" appears every time shutting down or
  rebooting.

Status in “upstart” package in Ubuntu:
  Confirmed

Bug description:
  I arrived here from bug 963106
  [https://bugs.launchpad.net/bugs/963106]. I thought that it was a
  problem with network-manager, but it was not.

  I was suggested that it is probably a problem with upstart : "that
  modemmanager simply hasn't had time to complete the shutdown process
  before umountroot is run. Since modemmanager is an upstart job,
  sendsigs doesn't kill it."

  lsb_release -rd:
       Description:	Ubuntu 12.04 LTS
       Release:	        12.04

  apt-cache policy upstart:
     upstart:
    Installed: 1.5-0ubuntu7
    Candidate: 1.5-0ubuntu7
    Version table:
   *** 1.5-0ubuntu7 0
          500 http://kambing.ui.ac.id/ubuntu/ precise-updates/main amd64 Packages
          100 /var/lib/dpkg/status
       1.5-0ubuntu5 0
          500 http://kambing.ui.ac.id/ubuntu/ precise/main amd64 Packages

  Hope this will be fixed. Thanks.

  ProblemType: Bug
  DistroRelease: Ubuntu 12.04
  Package: upstart 1.5-0ubuntu7
  ProcVersionSignature: Ubuntu 3.2.0-26.41-generic 3.2.19
  Uname: Linux 3.2.0-26-generic x86_64
  NonfreeKernelModules: nvidia
  ApportVersion: 2.0.1-0ubuntu8
  Architecture: amd64
  Date: Sat Jun 30 00:08:18 2012
  InstallationMedia: Custom Live CD - Release amd64
  SourcePackage: upstart
  UpgradeStatus: No upgrade log present (probably fresh install)

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